EP0675337A2 - Appareil d'examen de taraudages, en particulier appareil d'examen de taraudages intérieurs - Google Patents

Appareil d'examen de taraudages, en particulier appareil d'examen de taraudages intérieurs Download PDF

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Publication number
EP0675337A2
EP0675337A2 EP95103111A EP95103111A EP0675337A2 EP 0675337 A2 EP0675337 A2 EP 0675337A2 EP 95103111 A EP95103111 A EP 95103111A EP 95103111 A EP95103111 A EP 95103111A EP 0675337 A2 EP0675337 A2 EP 0675337A2
Authority
EP
European Patent Office
Prior art keywords
housing
thread
drive motor
slide
carriage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP95103111A
Other languages
German (de)
English (en)
Other versions
EP0675337A3 (fr
Inventor
Oskar Pfeifer
Bernd Zeeb
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bodenseewerk Geratetechnik GmbH
Original Assignee
Bodenseewerk Geratetechnik GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bodenseewerk Geratetechnik GmbH filed Critical Bodenseewerk Geratetechnik GmbH
Publication of EP0675337A2 publication Critical patent/EP0675337A2/fr
Publication of EP0675337A3 publication Critical patent/EP0675337A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
    • G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
    • G01B5/204—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures of screw-threads
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B3/00—Measuring instruments characterised by the use of mechanical techniques
    • G01B3/46—Plug gauges for internal dimensions with engaging surfaces which are at a fixed distance, although they may be preadjustable
    • G01B3/48—Plug gauges for internal dimensions with engaging surfaces which are at a fixed distance, although they may be preadjustable for internal screw-threads

Definitions

  • the invention relates to a thread tester, in particular an internal thread tester, with an elongated housing, a drive shaft extending in the longitudinal direction of the housing, onto which a thread plug gauge can be placed, a reversible drive motor for driving the drive shaft and means for measuring thread data.
  • Such a thread tester is known for example from DE-U-9316 783.0.
  • a sleeve is provided which surrounds the thread plug gauge and is loaded by a spring and which comes into contact with a flat reference surface surrounding the thread when the thread tester is used.
  • the stroke of the sleeve relative to the housing is measured and displayed by means of a zero-adjustable display device. As a result, the screw-in depth of the thread is measured directly in relation to the reference surface.
  • the invention has for its object to facilitate the handling of a thread tester of the type mentioned.
  • this object is achieved in that a slide is guided in the housing in the longitudinal direction and is held in a central position by springs, the drive motor sits in the slide with the drive shaft and the drive motor moves from one to the other Relative movement between carriage and housing responsive position sensor can be controlled such that it runs in one direction of rotation when the carriage is deflected to one side from the central position and from the central position in the other direction when the carriage is deflected to the opposite side.
  • the slide with the thread plug gauge is moved relative to the housing.
  • the thread plug gauge is then driven by the drive motor via the drive shaft so that it screws into the internal thread.
  • the housing moves relative to the carriage so that the drive motor is reversed.
  • the thread plug gauge is screwed out of the internal thread.
  • the drive motor can be powered by an accumulator built into the housing.
  • the result is a handy thread tester that can be used anywhere.
  • the carriage can be held between two stop bodies.
  • the stop bodies are each movably guided in the housing in the direction away from the carriage and bear against a housing stop in the direction of the carriage.
  • the stop bodies are each preloaded against the stop by a prestressed spring. In this way, the slide is in the rest position, without axial forces, in a precisely defined position relative to the housing. To move the slide out of the middle position, the preload of one of the springs must be overcome. The other spring is not effective because it presses the stop body against the stop fixed to the housing. So there is a clear restoring force even with small deflections.
  • the speed of the drive motor is advantageously continuously variable relative to the housing by the tap depending on the deflection of the carriage.
  • a pulse generator can be coupled to the drive motor to determine the thread depth.
  • the pulses from the pulse generator are connected to a counter.
  • the counter is reset to zero when the drive motor is reversed from screw-in to unscrew and read out from the test thread when the thread plug gauge is loosened.
  • the readout of the counter can be triggered by the position sensor when the slide returns to its central position. However, the reading of the counter can also be triggered by a drop in the motor current of the drive motor when the thread plug gauge leaves the internal thread and the torque accordingly drops.
  • An axially adjustable collar can be attached to the housing, which coaxially surrounds the drive shaft and the thread plug gauge.
  • the collar then defines a screw-in depth by which the thread plug gauge projects beyond the edge of the collar in the rest position.
  • the thread plug gauge is attached to the internal thread to be tested and pressed against the workpiece.
  • the thread plug gauge is then screwed into the internal thread.
  • the collar sits on the surface of the workpiece around the internal thread.
  • the carriage is still moved against the housing.
  • the thread plug gauge is therefore screwed further into the internal thread until the slide has reached its central position relative to the housing.
  • the drive motor runs ever slower and finally stops. In this state, the thread plug gauge has been screwed into the thread exactly the distance by which the thread plug gauge protrudes over the edge of the collar in the middle position of the slide.
  • the motor current of the drive motor can be passed through a measuring resistor, the voltage drop across the measuring resistor providing a measure of the torque applied by the drive motor.
  • the voltage tapped at the measuring resistor can be connected to a motor controller with a reference voltage.
  • the maximum torque output by the drive motor is then limited by the motor controller to a value specified by the reference voltage.
  • a field for control and display element can be provided on the outer surface of the housing.
  • 10 denotes an elongated, tubular housing.
  • a carriage 12 In the housing 10, a carriage 12 is guided to be longitudinally movable.
  • the carriage 12 contains a drive motor 14 and a gear 16 (FIG. 2) and a drive shaft 18.
  • the drive shaft 18 is supported in bearings 20 and 22 in a sleeve 24 of the carriage 12.
  • a thread plug gauge 26 can be attached to the drive shaft 18 by means of a Chuck 28 are attached.
  • An adjustable collar 30 is attached coaxially to the drive shaft 18 and the thread plug gauge 26 on the end face of the housing 10. The collar surrounds the thread plug plug 26 only over part of its length.
  • the thread plug gauge 26 protrudes over a length "H" beyond the front edge 32 of the collar 30.
  • the carriage 12 is centered by two springs 34 and 36.
  • the spring 34 is supported on the left in FIGS. 1 and 2 on a shoulder 38 of the housing 10 and abuts a stop member 40.
  • the stop member 40 bears against a shoulder 42 of the housing under the influence of the spring 34.
  • the stop member 40 is movable against the action of the spring 34 to the left in FIG. 1, ie "away from the slide 12".
  • the stop member 40 forms a resilient stop for the carriage 12.
  • the spring 34 is preloaded.
  • the spring 36 is supported on the right in FIGS. 1 and 2 on a shoulder 44 of the housing 10 and abuts a stop member 46.
  • the stop member 46 bears against a shoulder 48 of the housing 10 under the influence of the spring 36.
  • the stop member 46 is movable against the action of the spring 34 to the right in FIG. 1, that is to say also “away from the slide 12”.
  • the stop member 46 forms a resilient stop for the slide 12 on the right side.
  • the spring 36 also has a pretension. In this way, the carriage 12 is held in a defined position between the stop members 40 and 46 in its rest position. The position of the stop members 40 and 46 in the rest position is precisely defined by the shoulders 42 and 48.
  • the stop member 46 is displaced against the action of the bias of the spring 36.
  • the stop member 40 does not follow but is held back by the shoulder 42.
  • the biases of the springs 34 and 36 therefore do not cancel each other out. Rather, the full prestress must be overcome with each shift of the carriage 12 from the rest position. The carriage 12 is therefore kept very stable in the rest position.
  • the slider 50 of a potentiometer fixed to the housing can be adjusted by the slide 12.
  • the potentiometer forms a position sensor 52. As indicated in FIG. 1, the position sensor 52 supplies output voltages of different polarities, depending on whether the slide 12 is deflected relative to the housing 10 to the right or to the left in FIG. 1 from the rest position.
  • the position sensor 52 has a plunger 54 which rests on the end face 56 of the slide 12 in a resilient, non-positive manner.
  • the internal thread test device is powered by an accumulator 58.
  • a power supply unit 60 with a connecting cable 62 can also be provided for the power supply, as shown in FIG. 3 corresponds to a side view of the internal thread tester, which also applies to the embodiment of FIG. 2.
  • the collar 30 forms part of an adjustable depth stop 64 which can be connected to the housing 10 by means of a quick coupling 66.
  • the collar 30 of the depth stop 64 can be axially adjusted by rotating a thrust sleeve 68.
  • the thrust sleeve 68 can be rotated by means of a knurling 70.
  • the housing 10 has a field 74 of operating and display elements 76 on its flattened lateral surface.
  • a freewheel 78 acting on both sides sits between the drive shaft 18 and the sleeve 24 of the carriage 12. This freewheel 78 does not hinder the rotation of the drive shaft 18 as long as the drive shaft 18 is driven. But if that Drive shaft 18 is stationary, then a torque can be exerted on the drive shaft 18 from the housing 10 via the slide 12 which is guided in the housing in a non-rotatable manner. If the thread plug gauge 26 jams in the internal thread to be tested, then it can be unscrewed by hand via the housing and the freewheel 78.
  • a pulse generator 80 is seated on the shaft of the drive motor 14.
  • the pulse generator supplies a sequence of pulses, each of which represents an angular increment of the angle of rotation.
  • Figure 4 is a block diagram of the control and signal evaluation. shown.
  • the control electronics 82 receives the voltage drop across a measuring resistor 84.
  • the motor current of the drive motor 14 flows through the measuring resistor.
  • the voltage at the measuring resistor 84 is a measure of the torque to be applied by the drive motor.
  • a motor controller 86 receives on the one hand the voltage drop across the measuring resistor 84 and on the other hand receives a reference voltage from the control electronics 82.
  • the motor controller 86 regulates the drive motor 14 so that the torque applied by the drive motor 14 does not exceed a value specified by the reference voltage on line 88.
  • the operation of the internal thread test device described is as follows: The ready-to-use internal thread tester is first threaded into the threaded bore to be tested with the drive shaft 18 at a standstill and aligned vertically. By lightly pressing the housing 10 in the screwing direction, ie against the workpiece, the housing 10 becomes relative to the slide bearing on the workpiece via the thread plug gauge 26 12 shifted to the left in Fig. 1 or 2.
  • the spring 36 is compressed by the shoulder 44 against the carriage 12 and the abutment member 46 resting thereon.
  • the spring 34 moves with the housing 10 to the left in FIGS. 1 and 2.
  • the stop member 40 lifts off the slide 12.
  • the grinder 50 reaches the left half of the position sensor 52 formed by a potentiometer.
  • the thread plug gauge 26 begins to screw slowly into the first threads.
  • the housing 10 can be pushed all the way to the left in FIG.
  • the thread plug gauge 26 is screwed in at maximum speed. Shortly before the set screw-in depth is reached, the collar 30 hits the surface of the workpiece.
  • the slide 12 is pulled from the maximally deflected position relative to the housing 10 in the direction of the central rest position. The movement of the thread plug gauge 26 thus becomes ever slower.
  • the drive motor 14 and thus the carriage 12 stop when the middle position is reached.
  • a further pressure of the housing 10 against the workpiece is absorbed by the sleeve 30 and does not lead to any further screwing-in movement.
  • the thread plug gauge 26 has then been screwed into the internal thread exactly by the distance "H" in FIGS. 1 and 2.
  • the screwing takes place with a predetermined torque. If a thread is damaged or dirty or the specified thread depth is not available, the screwing-in process is practically always carried out with the maximum torque until the speed of the drive motor 14 drops to zero.
  • the control electronics 82 contains a counter 90. This counter receives and counts pulses that are generated by the pulse generator 80. Each of these pulses corresponds to an angular increment of the rotation of the drive motor.
  • the counter 90 is reset to zero when the thread plug gauge 26 has reached its screw-in end position and the drive motor 14 is then reversed by pulling on the housing 10. Then, while unscrewing, the pulses from the pulse generator 80 are counted and the entire angle of rotation of the drive motor 14 is determined.
  • the slide 12 once returns to its central rest position under the influence of the springs 34 and 36.
  • the engine speed of the drive motor 14 is thus regulated to zero.
  • the torque to be applied by the drive motor 14 drops suddenly and thus the motor current. This process is used to initiate a reading of the counter 90. The meter reading thus obtained provides the screwing depth.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
EP95103111A 1994-03-30 1995-03-04 Appareil d'examen de taraudages, en particulier appareil d'examen de taraudages intérieurs. Withdrawn EP0675337A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19944411077 DE4411077A1 (de) 1994-03-30 1994-03-30 Gewinde-Prüfgerät, insbesondere Innengewinde-Prüfgerät
DE4411077 1994-03-30

Publications (2)

Publication Number Publication Date
EP0675337A2 true EP0675337A2 (fr) 1995-10-04
EP0675337A3 EP0675337A3 (fr) 1996-03-06

Family

ID=6514259

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95103111A Withdrawn EP0675337A3 (fr) 1994-03-30 1995-03-04 Appareil d'examen de taraudages, en particulier appareil d'examen de taraudages intérieurs.

Country Status (2)

Country Link
EP (1) EP0675337A3 (fr)
DE (1) DE4411077A1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006034823A1 (de) * 2006-07-27 2008-01-31 ARTIS Gesellschaft für angewandte Meßtechnik mbH Vorrichtung und Verfahren zur Gewindeprüfung
KR101028527B1 (ko) * 2008-07-03 2011-04-11 국일메카트로닉스 주식회사 탭 불량 검사장치
EP2428763A1 (fr) * 2010-08-03 2012-03-14 ARTIS Gesellschaft für angewandte Meßtechnik mbH Dispositif et procédé destinés au contrôle de filets à mesure de trajectoire
CN105953677A (zh) * 2016-05-31 2016-09-21 安徽科技学院 锻压生产线螺纹检测装置
DK179228B1 (da) * 2017-01-17 2018-02-19 Leitech Instr Aps Gevindkontrolværktøj
JP2019007747A (ja) * 2017-06-20 2019-01-17 ネジテック株式会社 ねじゲージ装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19719389C2 (de) * 1997-05-07 2002-10-31 Bayerische Motoren Werke Ag Gewindelehrdorn
DE102007028615B4 (de) 2006-06-23 2023-11-30 Hans Steitz Gewindeprüfgerät mit einer mechanischen Tiefenmesseinrichtung
DE102020102686B4 (de) 2020-02-04 2022-05-12 Audi Aktiengesellschaft Vorrichtung zur Tiefenprüfung von Gewinden mit Freistich im Gewindeauslauf
CN111380489B (zh) * 2020-03-25 2022-07-12 宁波名古屋工业有限公司 一种装有衬芯的管件检测设备及其检测方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1448439C (de) 1964-09-18 1973-08-23 Kordt & Co , Fabrik fur Lehren und Messzeuge, 5180 Eschweiler Gewinde Prüfgerät

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0696208B2 (ja) * 1986-06-19 1994-11-30 松下電器産業株式会社 ねじ締め機
US4989331A (en) * 1989-11-06 1991-02-05 Dodge Robert G Gage
JP2941999B2 (ja) * 1991-06-04 1999-08-30 株式会社ジャパンエナジー 自動ドライバ
US5214856A (en) * 1992-05-21 1993-06-01 Morse Hemco Corporation Screw thread measuring device
DE9209254U1 (de) * 1992-07-10 1992-09-10 Bodenseewerk Gerätetechnik GmbH, 7770 Überlingen Gewindeprüfeinrichtung
DE9316783U1 (de) * 1993-11-03 1994-01-20 Bodenseewerk Gerätetechnik GmbH, 88662 Überlingen Gewindemeßeinrichtung zur Messung der Einschraubtiefe von Gewinden

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1448439C (de) 1964-09-18 1973-08-23 Kordt & Co , Fabrik fur Lehren und Messzeuge, 5180 Eschweiler Gewinde Prüfgerät

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
KORDT GEWINDE-PRUEFMASCHINEN

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006034823A1 (de) * 2006-07-27 2008-01-31 ARTIS Gesellschaft für angewandte Meßtechnik mbH Vorrichtung und Verfahren zur Gewindeprüfung
US7533471B2 (en) 2006-07-27 2009-05-19 Artis Gesellschaft Fur Angewandte Messtechnik Mbh Apparatus and method for testing threads
DE102006034823B4 (de) * 2006-07-27 2015-08-27 Artis Gmbh Vorrichtung und Verfahren zur Gewindeprüfung
KR101028527B1 (ko) * 2008-07-03 2011-04-11 국일메카트로닉스 주식회사 탭 불량 검사장치
EP2428763A1 (fr) * 2010-08-03 2012-03-14 ARTIS Gesellschaft für angewandte Meßtechnik mbH Dispositif et procédé destinés au contrôle de filets à mesure de trajectoire
US8793887B2 (en) 2010-08-03 2014-08-05 Artis Gmbh Method and apparatus for thread testing by distance measurement
CN105953677A (zh) * 2016-05-31 2016-09-21 安徽科技学院 锻压生产线螺纹检测装置
DK179228B1 (da) * 2017-01-17 2018-02-19 Leitech Instr Aps Gevindkontrolværktøj
DK201770030A1 (da) * 2017-01-17 2018-02-19 Leitech Instr Aps Gevindkontrolværktøj
WO2018134156A1 (fr) * 2017-01-17 2018-07-26 Leitech Instruments ApS Outil
JP2019007747A (ja) * 2017-06-20 2019-01-17 ネジテック株式会社 ねじゲージ装置

Also Published As

Publication number Publication date
DE4411077A1 (de) 1995-10-05
EP0675337A3 (fr) 1996-03-06

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